Sanford, Colorado has a Cold Semi-Arid Climate climate (Köppen classification: BSk). Average annual temperatures range from -4.2 °C (low) to 15.1 °C (high). Annual precipitation averages 196.8 Millimeters. Sanford is located in USDA Plant Hardiness Zone 5a. The growing season typically runs from the last frost around Jun. 1 - Jun. 10 through the first frost around Sep.11 - Sep. 20.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -17.5 °C | 1.2 °C | 7.11 mm |
| February | -13.5 °C | 4.7 °C | 5.84 mm |
| March | -8.1 °C | 10.8 °C | 12.45 mm |
| April | -4.2 °C | 15 °C | 14.73 mm |
| May | 1 °C | 19.9 °C | 17.78 mm |
| June | 4.9 °C | 25.3 °C | 10.92 mm |
| July | 8.3 °C | 27 °C | 31.24 mm |
| August | 7.1 °C | 25.9 °C | 33.27 mm |
| September | 3 °C | 23.1 °C | 26.42 mm |
| October | -3.8 °C | 17.1 °C | 17.27 mm |
| November | -10.4 °C | 9.4 °C | 10.92 mm |
| December | -16.6 °C | 2 °C | 8.89 mm |
| Annual | -4.2 °C | 15.1 °C | 196.84 mm |
| Average First Frost Date | Sep.11 - Sep. 20 |
| Average Last Frost Date | Jun. 1 - Jun. 10 |
| Average Days With Frost | Over 180 Days |
| Plant Hardiness Zone | Zone 5a : -28.9°C to -26.1°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Severe Drought |
| Köppen Climate Classification | BSk - Cold Semi-Arid Climate |